Finding the Third Proportional to 1,686,664 and 2,608,813

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686,664 : 2,608,813 = 2,608,813 : x
2. Step 2: Convert to fraction form
   1,686,664/2,608,813 = 2,608,813/x
3. Step 3: Cross multiply
   1,686,664x = 2,608,813 × 2,608,813
4. Step 4: Simplify right side
   1,686,664x = 6,805,905,268,969
5. Step 5: Solve for x
   x = 6,805,905,268,969/1,686,664
6. Step 6: Final answer
   x = 4,035,128.08